Wrench.



H. T. WILSON.

WRENCH.

APPLICATION FILED mm, 1913.

1,070,569, Patented Aug. 19, 1913.

Snow wow Early]? IVY/Z9020.

elf/Wag UNITED STATES PATEN OFFICE.

HARRY T. WILSON, OF CHICAGO, ILLINOIS.

WRENCH.

To all whom it may concern Be it known that I, HARRY T. VVILsoN, acitizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, have invented certain new and useful Improvementsin renches, of which the following is a specification.

This invention relates to wrenches having a sliding jaw which isadjusted by a screw, and its object is to provide the adjusting screwwith a device for taking up wear by holding the screw and the thumbpiece thereof to their seats, so that the jaw will not lose its gripwhen set after the wrench has been used for some time and the screw andthe thumb piece have become worn at their seats.

In order that the invention may be better understood, reference is hadto the accompanying drawing in which an elevation of a wrench, partly insection, is shown provided with the take-up device.

Referring specifically to the drawing 5 denotes the shank of the wrenchat one end of which is a fixed jaw 6, and at the other end a grip 7. Onthe shank is mounted a slidable jaw 8 which is adjusted by means of ascrew 9 arranged and operated in the ordinary manner. The screw isfitted with a knurled thumb-piece 10 whereby it is turned. In the outerend of the grip is a seat 11 for the inner end of the screw, andadjacent to this seat the shank 5 has a recess 12 in which seats acoiled spring 13 and a ball 14, the latter being at the outer end of therecess and projecting therefrom, and the spring being behind the ball sothat Specification of Letters Patent.

Application filed April 2, 1913.

Patented Aug. 19,1913.

Serial No. 758,464.

it tends to force the latter outward. The recess extends obliquely intothe shank from the edge which is opposite the screw, and it is solocated that the ball bears against the thumb-piece 10 in such a way asto force the screw 9 to its seat 11. Thus, the spring 13, through theball 14, exerts a constant pressure on the thumb-piece, and the screw isthus held firmly to its seat at all times. If any wear of the screw orthe thumb piece at the seat takes place, this is taken up by the balland spring, thus reducing the looseness or play of the parts at theseat.

The device is very simple and can be readily applied to the wrenchwithout alter ing or modifying the structure thereof, other than boringthe recess 12. As the presse-r device is aball, the operation of thescrew is not rendered harder to an appreciable extent.

I claim:

A wrench having a sliding jaw, a screw for adjusting the jaw, a seat forone end of the jaw, a shank on which said jaw is mount ed, said shankhaving an edge recess inclined in the direction of the seat, athumbpiece on the screw, a ball projecting from the recess andengageable with the thumb piece, and a spring mounted in the recess andengageable with the ball to press the same outward.

In testimony whereof I aflix my signature in presence of two witnesses.

HARRY T. WILSON.

Witnesses C. H. WARNER, H. G. BATCHELOR.

(spies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

